Recently published studies regarding pet foods, over-the-counter products, and medications are revealing that some of these products have more ingredients than are actually listed on their labels.

The consequences of these incorrect product labels range from annoyed pet owners who are upset that they don't truly know what they're feeding their pets, to veterinarians conducting flawed dietary elimination trials due to unlisted antigens in products.

The researchers tested three OTC products and four veterinary therapeutics for unlisted soy, beef, and pork ingredients. Three products contained ingredients that correctly matched their labels. Of the remaining four products that contained ingredients missing from their labels: